like a lion

If March comes in like a lion, and goes out like a lamb, what does that really mean? Or look like? If a lion is a light dusting of snow followed by a mildly sunny afternoon, that’s a pretty kind hearted and chill lion. Maybe even a brown-nosing lion. Like the Cowardly Lion? It sounds more like a lamb to me - fluffy, wooly, cute. Weather sayings are the weridest! Seriously. But either way, I know March and Spring in Portland means rain. Days like yesterday are just sweet little gifts.